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Brock Lesnar, pictured at SummerSlam at Barclays Center of Brooklyn on August 23, 2015 in New York City, will defend the WWE Universal Championship in the biggest match of SummerSlam 2017. Getty Images

The WWE SummerSlam 2017 match card is shaping up with less than four weeks remaining until the pay-per-view. Members of both the “Monday Night Raw” and “SmackDown Live” roster will be on the card, and a few of the matches have already been made official.

More than half of the card isn’t set in stone, though that should change pretty quickly. AJ Styles will probably be the United States Champion after swapping the title with Kevin Owens for a few weeks. Seth Rollins and Dean Ambrose should be involved in the same match, whether it’s as a team or against one another.

READ: WWE Battleground 2017 Results

Here’s a look at what SummerSlam looks like, thus far.

Brock Lesnar vs. Roman Reigns vs. Samoa Joe vs. Braun Strowman (Fatal 4-Way WWE Universal Championship Match)

This match had been coming for weeks, and it was finally made official by Kurt Angle on “Monday Night Raw.” All three challengers have a legitimate argument that they deserve a title shot. Reigns ended The Undertaker’s career at WrestleMania 33, joining Lesnar as the only wrestler to defeat the Deadman on WWE’s grandest stage. Strowman is the most dominant man in WWE, and he has two wins in three tries over Reigns since February. Joe lost to Lesnar at Great Balls of Fire, but he gave the champ one of his toughest challenges since he returned to WWE in 2012.

The fatal 4-way likely means that Lesnar will lose the belt without getting pinned. Reigns is the favorite to win the championship, but don’t count out Strowman, who’s been the best part of “Monday Night Raw” in 2017.

Naomi vs. Natalya (SmackDown Women's Championship Match)

Natalya won her title shot by defeating Charlotte, Becky Lynch, Lana and Tamina in a five-way elimination match at Battleground. It’s her first singles match for a title in over a year, and she earned it by becoming the top female heel on “SmackDown Live.” Naomi has been over with the live crowds since she first won the championship earlier this year, and WWE even altered the belt for her, so it might be a while before she drops the title.

There’s always the chance that neither Naomi or Natalya will walk out of SummerSlam as the SmackDown Women’s Champion. Carmella hasn’t done much since winning her Money in the Bank briefcase, and she could cash in at SummerSlam.

Alexa Bliss vs. Bayley (Raw Women's Championship Match)

This match came as somewhat of a surprise when it was made official on “Monday Night Raw.” Bayley defeated Sasha Banks in a No.1 contender’s match to earn the title shot, looking for redemption from two PPV losses to Bliss since WrestleMania 33. Bliss has held the championship since she took it from Bayley at Payback on April 30.

It appeared that either Sasha or Nia Jax would somehow get involved in the title picture before SummerSlam. The card is always subject to change, so it should be interesting to see what they do over the next few weeks.

Jinder Mahal vs. John Cena or Shinsuke Nakamura (WWE Championship Match)

Cena and Nakamura will face off in a singles match with a WWE Championship shot at SummerSlam on the line. It’s long been suspected that Cena would take on Jinder at Barclays Center, and he has a good chance to become the first member of the main roster to pin Nakamura clean. WWE might have big plans for Nakamura at SummerSlam, but it’s hard to believe he’ll be the WWE Champion before the summer is over. It is possible, however, that Jinder could interfere in Tuesday’s match, turning the SummerSlam title match into a triple-threat.

Just like with the SmackDown Women’s Championship Match, the Money in the Bank briefcase could play a major role in this title match. It’s hard to see Jinder actually beating Cena, but Baron Corbin could get involved and make sure neither wrestler leaves SummerSlam with the title.

READ: Is Brock Lesnar Returning To UFC, Losing His Title At SummerSlam?

The New Day vs. The Usos? (SmackDown Tag Team Championship Match)

This match hasn’t been added to the card just yet, but it seems to be inevitable. The Usos are owed a rematch for their belts after losing them to The New Day at Battleground. In possibly the worst WWE PPV of 2017, the tag teams put on the most exciting match of the night, and WWE will likely want them to do it all over again at SummerSlam.

With the American Alpha being broken up, there is little depth to the SmackDown Tag Team Division. Breezango has been entertaining, though they have already lost to The Usos. The Ascension won’t be getting a title shot, and The Hype Bros. haven’t done much since Zack Ryder’s return.