Interesting.

On the one hand they have kinda already used the we are not alone mankind discovers aliens/ they are among us plot in the previous movies. On the other hand this is a more toned down, mysterious teaser than ROTF, and if anything we probably need a less mindlessly ambitious film.

It is just the teaser though. So I'll wait and see swaying neither positive or negative for now.

As for the mystery robot, for all we know it's Primes long lost second cousin Bobtimus.