Board Thread:General Discussion/@comment-151.77.66.151-20130606180331/@comment-28857013-20140106124629

There aren't really "everything" in Btd5. By looking at those ideas, you can already see there can be more features beside the ones on BTD5 already. But ﬁrst of all since BTD5 is updating constantly now, certainly it can add new features (beside bloons) to it without making a complete new game, unless one feature gives a HUGE change to the game, involving lots of code replacing and stuff, but for that it won't possibly be made this soon.

There is also a possibility that if NK decided to make a pay2play feature on the game(s) and mostly the game will have lesser players will play it and the game will die, like I have seen on TWO games that have died completely since the aforementioned feature is added. Then there will be obviously no BTD6.