So will this tie in with V For Vendetta?
This needs to happen, if only because seeing V vs. Batman would be awesome.

The title is stupider than I expected, but its not a huge deal. In the long run, it could be called "Please Come see this Prequel to Justice League" and it won't effect whether the movie is good or not.
As for the suit, it's batman. I want him to have an awesome, superhero looking suit. Realism can be ok, but I'm sitting down to watch a movie about a guy who dresses as a bat/flies/uses an alien power ring, etc. "Realism" is not something I consider a priority, and it can sometimes really pull down a superhero movie (like Nolan's Batman movies). Marvel knows when to let their movies just be fun, and throw realism out the window when the story/characters don't need it. DC movies need to lighten up (in more way than one), and I'm glad Affleck's suit looks like it would fit into a comic fairly well.