I can't help but feel like I'm part of the minority here, but I enjoyed Salvation.  It didn't have nearly the same epic impact and development as Terminator 2, but it was an extremely entertaining installment that thankfully didn't manage to screw up the already convoluted plot.  Perhaps I was blinded by how stunning the cinematography and explosions were.  Sure, there were plenty of complaints to be had, but I won't address them here because they're rather large spoilers.  The one thing I really question is McG can further the plot of the franchise without screwing it up.  I'm not quite sure how he would bring back Connor, unless perhaps in a flashback...Because IIRC, she passed away from breast cancer, yes? (OMFG SPOILER! lol)  "But k4tzm4n, you just said you enjoyed Salvation and didn't mind the lack of plot". Well, that was just for one installment, silly.  If he wants to work on the next TWO, we need some big developments and I certainly won't accept two more popcorn entertainment features....And to be honest, I question if McG can properly pull that off.  However, he does seem rather passionate about the franchise so I'll give him credit for that. 
 
Sorry for the on-going babbling, I'm on a caffeine high at the moment. 

He should feel free to do another one. I liked Salvation too.

The impact of a movie is defined by what it brings as new. Matrix brought cool fighting styles and ideas, T2 openned a new era for fx and was just badass, Jurassic park presented the first truly believeble giant creatures on screen... but what exactly did Salvation bring to make itself stand out in the present sea of cgi contaminated movies out there? Very little. I enjoyed it as a movie, but thought it was incomplete as a terminator-movie. The family name it carried raised the bar too high. Just my 2 cents...

" what exactly are those big metal cylinders in front of their legs?? "

I enjoyed TS, I've enjoyed them all. As soon as T2 came out, everything changed and the rules for timelines went out the window, so as long as they keep things fun and interesting...I;ll be watching

Salvation wasn't great by any means but I can see where McG was shooting for, He missed the mark but I give him an A for effort though. Could he do a another film on this Terminator franchise sure and if he does I hope he's learned from his mistakes on Salvation. Having said that I hope he can pull out of this Terminator franchise killer pit the media has put him under. He's not a great director but he has potential, Let him get rolling I'm sure he will deliver at some point in the near future. 

" @Mr.Hulk_Smashin'! said:

" what exactly are those big metal cylinders in front of their legs?? "

those are guns.  i feel like Terminator was good when there was a basic timeline and they where sticking with it.But the Sara Connor Chronicles (from what i undertsand) effectively undid or altered the events of T1 and T2. And Salvation kinda re-wrote what John connors future was supposed to be like.   I guess it all fits still, i just dont like it when things build upon one brilliant thing, and then cut it for another idea that only does good becuase of the past. Its kinda the reason i dislike "One More Day" so much. Its like building an empire selling Cookies and cream icecream, then switching over to  Rocky Road. Sure RR is good, but what about your loyalty to C&C, the icecream that made you, and the customers who love it? i know its still icecream but still...  idk. i like Analogies. "

"I wasn't crazy with how he did the last one.  It had a good concept it was just lacking something.  "

I'd be intrigued to see James Cameron to come back, but he's busy with Avator so...

McG seems enthusiastic about sticking with Terminator. Maybe he'll do fine provided he isn't replaced by another director. Whoever gets the rights, it'll be their decision anyway.

why not