Fine by me. Delay it and get it right rather than rush it out and end up with a crappy product.
Also, if Ben Affleck's Batman is really in trouble, delay that as well and give us Man of Steel 2 for 2018. It's only fair that Superman gets a movie for his 80th anniversary.
How does it feel to be deconstructed?

BvS was delayed an entire year. It took 3 years to come out only to spray cinematic diarrhea on audiences world-wide.

Just get Snyder to do it, so it doesn't get delayed longer than it should.

that would be a good idea, if James Wan has things in place for Aquaman i would say do it. We have Arthur and Mera.. Vulko.
or maybe the 2nd solo Superman movie maybe could get started. I don't think delaying Flash for a little bit will hurt if things aren't what they should be.
IMDB taught me: cynicism is praised. optimism must be stamped out wherever it can be found.

I think the best idea is switch The Flash and Aquaman. Aquaman comes out in March 2018 and have The Flash come out July 2018.
TEAM DOCTOR STRANGE

Deadpool is going from the little engine that could to the locomotive that can't. It was obvious this kind of stuff would happen with that type of movie and it's success.
What went from a low budget actor/director passion project turned into a high earning record breaking spectacle that the studio now wants to be a part of. 2/3rds of the team that made the movie great already left because of the studio and reynolds.

doesn't sound like she's leaving from comments she's made recently:
http://www.hollywoodreporter.com/heat-vision/flash-movie-kiersey-clemons-director-rick-famuyiwas-departure-943843
seems like Rick is the only loss for The Flash (an important one, of course..it's never fun to lose a creative voice on a project, i imagine).
it's not that different than Deadpool, except it seems from the outside looking in that the Deadpool thing is more of a power-play between Miller & Reynolds
IMDB taught me: cynicism is praised. optimism must be stamped out wherever it can be found.

Deadpool 2 already has a new director. Flash doesn't. Not the same situation.
If you can't defend a movie without bashing another, you will be put on ignore. No exceptions.

..
So besides directors leaving, Deadpool 2 hasn't lost any cast members or is now behind on the script, but you think that's the same situation as a film where director and actors walked, and now needs heavy script doctoring.
And you think that's the same situation.
I can't tell, are you being serious right now?

Thanks to Batmeh v Supermeh Yawn of Justice, the "S" now stands for Sidekick

Don't think Deadpool 2 has a script yet. Nor any official additional cast announcements. Apparently Reynolds allowed by the studio is flexing to much muscle and not many seem to be down with it.

I haven't been following Deadpool's pre production, but doesn't the Flash's situation also involve casting, scripting, etc not being completed? How are those things on Deadpool's end?
Miss Peregrine: Silliest Movie of the Year?

WB has DC projects pending so it'll take lots of development but Deadpool 2 is just one.

Not when it was majorly the director that made the movie the hit it was.

Reading problems? did you miss the part where they said several of the actors were jumping ship with the director? or the script not being done?
Deadpools director left because of problems with Reynolds. now seeing as he loves the character, pushed for the film, did an amazing marketing campaign on his own for it, I'd say when there's creative differences between someone that knows the character on the level he does and a director, it's good when the director walks.

Thanks to Batmeh v Supermeh Yawn of Justice, the "S" now stands for Sidekick

How so? They are both ships without a captain and due to reasons like Studio Interference and creative differences.

No. Deadpool and The Flash are two different situations.

Does that mean Deadpool 2 is going to be delayed now? Since Tim Miller left and Junkie XL left with him.

No shocker.
COOKIES AND MILK!-Ed