Given that everything in movies and games must be done in threes now and that Bey mentioned "setting it up for the next guy" I am not shocked at all that a trilogy is planned. Hopefully they can actually make it have narrative continuity this time. The three movies out now are really three independent movies (that really all tell 3 versions of a similar story). It would be cool if there was some clear framework (even minimal) was decided upon for the next three. I don't expect it, but it'd be cool. For me, I don't mind if Bay stays on for 6 films if they can refresh the robots somewhat. I do NOT see a 4th (5th if you count how similar Prime is) version of the same design Camero Bee and Peterbuilt Optimus selling too well as toys. Although that might not happen until a new director takes over (or Hasbro realizes that they've overmilked those designs).