This is really dumb. First of all, it's treating the audience like they're idiots. If WB/DC REALLY thinks that people would confuse Arrow Deadshot with Will Smith Deadshot for example, then that's a problem with THEM, not the audience. Give your fans a little more credit, by which I mean ANY credit
Second, their whole reasoning behind keeping the TV and Film-universes separate was so that this DIDN'T happen. You could tell different stories with these characters in different universes, while not stepping on each other's toes (as much as I love Marvel overall, that does happen from time to time with them). However, that appears to be EXACTLY what's happening. So if you're STILL going to step on each other's toes, then you might as well connect the films and TV shows. At least then you'd be getting some of the rewards, instead of ONLY the problems.
And third, where does it end? So when the Flash movie comes out, are we going to cancel show? Or are characters like Barry, or Captain Cold, or Captain Boomerang, or Reverse Flash, etc suddenly going to be off-limits? Because that's where this is heading. Are we never going to see Amanda Waller again on Arrow because she's also appearing in the SS movie, or Deathstroke if he appears in the movie, etc? It just makes no sense.
Basically it's dumb, counterproductive, and frankly insulting to the audience.