Samsung Galaxy S2's launch in the U.S. has met with multiple hurdles including Apple's legal recourse, Verizon's reluctance to offer the phone on its network and its postponed official New York launch event courtesy of hurricane Irene.

However, it's not just natural forces, Apple and Verizon that are impeding its global march, but also a host of upcoming Android phones.

Here are some rumored phones which can spoil Samsung Galaxy S2's party:

HTC Vigor:

The phone from the HTC camp which is due to hit Verizon's 4G LTE network is rumored to sport a 1.5GHz dual-core processor. The phone, which is touted to be a replacement for the HTC Thunderbolt, is expected to don a 4.3-inch display with 1280x720 screen resolution. Vigor is surmised to be fitted with an 8 MP camera. It will run on Android Gingerbread juice. Also it is expected to offer 1GB RAM, 16GB internal storage and is also surmised to incorporate Beats Electronics Technology - best known for the high-performance line of headphones backed by hip-hop artist /producer Dr. Dre. Leaked pictures of the phone were recently posted on Droid Life.

Motorola Droid HD:

Pictures of the phone appeared on Engadget last week. It is believed that Droid HD will bring the goodness of Gingerbread on a 4.5-inch display with a whooping 1280x720 screen resolution. The phone is also expected to sport an 8MP camera capable of shooting videos in 1080p. Snapshots reveal that the phone has a SIM slot and a MicroSD slot on the left side and a volume rocker and power button on the right side.

The phone would be around 8.5 or 9mm thick while Samsung Galaxy S 2 is 8.49mm thick. Thus, Droid HD could join the league of super thin Androids if the report is true.

It is said that Droid HD could possibly the Motorola Dinara, which Droid Life reported in July. It is possibly slated for a winter release and was considered to be the next best thing coming from the Motorola stable. It was then rumored that it will feature a TI OMAP processor, 1GB RAM, a screen larger than Bionic and a lock button on the side.

HTC Holiday:

Most recently, pictures of the HTC Holiday were released by an XDA Developer forum member. It is rumored that HTC Holiday will feature a 4.5-inch capacitive screen with 960x540 screen resolution. It is expected to be powered by a 1.2GHz dual-core Qualcomm MSM8660 processor. It will offer 1GB RAM and will sport an 8MP camera. Holiday will likely run on Android Gingerbread juice. The phone is slated to be released on the AT&T network.

Nexus Prime:

In June it was reported that Google will launch its Ice Cream Sandwich-based pure Android phone Nexus Prime during Thanksgiving. It is rumored that the phone will be powered by a Qualcomm Snapdragon Krait chipset or TI OMAP4460 chipset clocking at 1.5GHz. It is expected to be a dual-core 1.2GHz or 1.5GHz processor. The phone is rumored to have a monster sized display, 1GB RAM, a 5MP rear-facing camera with 1080p video capture capability and will come sans physical buttons.