I hate to be pessimistic about this but I kind of am. I'll still see it though and leave ultimate judgement 'till then.
Franken-dinos... seems to just be the franchise giving itself licence to create whatever dinosaur-like movie monsters they want to, (Alan Grant was right.) Doesn't seem too big a step given the original's casting of Dilophosaurus as three foot tall poison-spitting frilled lizards - in fact that being the case you wonder why they'd bother having franken-dino as a plot point - but still seems lazy. I mean dinosaurs are badass on their own and there are plenty you could go with as the big bad without just making up your own, (I hope the T-Rex makes an appearance though.)
I also feel kind of "meh" about the casting of Chris Pratt. Nothing against the guy, he's just the generically handsome actor-du-jour. Thing is characters like Alan Grant and Ian Malcolm had actual character, back-stories, lives beyond what was presented on screen. And the actors were chosen to portray that. Sam Neill and Jeff Goldblum aren't your traditional action/adventure actors but for a palaeontologist thrust into dealing with escaped dinosaurs and a narcissistic mathematician who considers himself a rock star they were perfect. Bob Peck wasn't a well-built "hero" type either either but as a wiry and experienced big game hunter tasked to dealing with dinosaurs he was great, (Pete Postlethwaite kind of carried this on in the second film.) And Richard Attenborough was a film great so there's not much you can say beyond that, (sadly neither Peck, Postlethwaite and most recently Attenborough are around any more of course.)
As far as I can tell Pratt's character "Owen" is just "protagonist". He doesn't seem to have a last name and is the park's "velociraptor expert" because of course the raptors were a fan favourite. It's the kind of decision that was probably made by movie executives and accountants rather than creatives.
Of course I'm going to give the film a chance but I can't help but have misgivings. Trailers are mean to showcase what the movie will be like. Compare this to Age of Ultron which got a lot of fans excited. This trailer to me, a big Jurassic Park fan, just makes me wary and concerned that I might be about to learn first-hand why people were so upset with Kingdom of the Crystal Skull. Tame raptors? Glowy-blue command centres? Genetically engineered super-dinos? There's just a lot that doesn't seem right.
Oh well. Surely it can't have anything as embarrassing as the talking raptor dream bit in JP3.