True enough. Topher is a little skinny to be Eddie Brock, but I don't mind.. as long as Venom is bulked up in the end.
Anyway - pure speculation here as well - I think the end shot will be of Venom. Most of the movie will probably be Spidey dealing with the symbiote, the Goblin's return and Sandman (I'm guess there'll be a partnership there similar to Osborne & Doc Oc from the last movie) and that Eddie will just play the jealous-of-Peter storyline until the end of the flick where he ends up with the symbiote.
All speculation aside, I am fucking psyched for this! I have to say that of all the next-gen superhero movies, the Spidey's have been the best.