Michael Bay and McG both are really, so far, hack directors and I have no idea how Bay was able to manage to make the first "Transformers" gel with the adults as well as the teeny-boopers. I guess it must have been an accident. Shea Lebeouf has a bigger box office draw than any of the other up-and-coming actors in Hollywood -- I just hope he gets something serious to do with his career than just pump out box office pot-boilers because he is a very good actor, as he demonstrated in "Disturbia," a very suspenseful Hitchcockian thriller.
Neil Blomkamp has mainly worked in special effects for television: http://www.imdb.com/name/nm0088955/
This doesn't look promising even though Ridley Scott's roots were in special effects but also production design.
This is also Blomkamp's first screenplay and I have a feeling this one is strictly to make a fast buck and not particularly for quality or originality.
BTW, believe this! "Terminator Salvation" was basically a flop in the US but the foreign box office was unexpected:
Domestic: $121,157,000 37.5%
+ Foreign: $201,543,644 62.5%
= Worldwide: $322,700,644
With DVD sales and rentals, pay-per-view, cable and subsequent sales in third string showings (FX Channel, et al), the movie will turn a fairly respectable profit. So look out for a fifth entry -- I just hope McG isn't directing, although I won't go so far as to wish him ill will jaywalking on the Sunset Strip (okay, that's only because I almost bit-the-bullet many years ago pulling that one!)