There has been speculation that Gingerbread will be Android 2.5 with the 3.0 Honeycomb version built for tablets. It has been a mere 5 months since the release of Froyo, and already the talk is moving to a possible Honeycomb launch in Q1 of 2011. Getting the new API calls for Gingerbread next week will allow for a look at some of the new functionality and a view of stock Gingerbread before the carriers put their overlays on top of it.
At this point, it would seem that the big question is if Windows Phone 7 can slow down the Android train. Another possible speed bump could be a Verizon branded version of the Apple iPhone. This would have the effect of slowing down Android right where the green robot gets plenty of its revenue from.