^^^it was probably the epic single bright light in the prologue. sort of like the last fight in the return of the king when they're in front of the gates.
the rest of the game definitly was effected by bulletstorm's environment. unfortunatly the first and second gears felt identical in style and environment. if the first gears was bulletstorm "1" and the real bulletstorm was #2 they'd have two bad ass series without them being kind of weak in places or feeling rushed.
many examples: how was the locust queen a human (or human looking) and how did the locust get down there in the first place? what was the deal with the sires in the second game? and why were the locust capturing prisoners just to lobotimize them? and that's just some of the issues with the second game. in the 3rd, why did they rush the lambent presence? like all of a sudden they were there. and how did they get that ship? there was no mention of a navy in the second or first game. the island where his dad lived could have been elaborated on i felt. what about that french resistance chick and the rest of the stranded? and for that matter the whole ice cube's character part of the story? it was all way too short. like butter spread over too much bread.
it felt like they missed a whole lot in various places. they probably had a gigantic storyline and edited it down to what we got. anywho, that's just my opinion.
this guy has his own opinion too but he's hilarious:
http://www.escapistmagazine.com/videos/view/zero-punctuation/525-Gears-of-War-2