as Bluydee says:they are making a spin-off of BT,Bubble Tanks Arenas,the game would have areas(i guess 20-30 bubblefields)+20 weapons(depending on time they have),a "customize your tank" option,multiplayer and more,go check out the blog of herointeractive(www.herointeractive.com/blog) the game looks really great!
if they make a third one, hopefully it would be better than the second one.
they just seem to get better and better! I like in the second one the fact that you can go through multiple upgrades and to fire just holding the left click button.
Someday i waish, but what else is there to put in? he basically got it all coverd in the first two, unless he can think of some more wackier upgrades, then i dont think there will be one...