It's a shame, but we've known for a very long time now that the big and small screen DC Comics heroes don't exist in the same world. Things are even pretty complicated in this respect when it comes to what's on TV thanks to Arrow and The Flash taking place in a different world to Supergirl, so squeezing all of those characters into the reality of Batman v Superman: Dawn of Jutice would be a stretch. Still, there are plenty of people who aren't happy about this, and it's that which has led to the Tweet below. Social media being what it is, that's led to some unexpected controversy, and the whole situation is best explained by Grant Gustin in the message posted with the Tweet below.
It's interesting to hear The Flash star's thoughts on not playing the big screen version of The Fastest Man Alive, and a shame that some people made something out of nothing in regards to a few liked Tweets! For what it's worth, Miller has said he'd like both versions of the hero to meet up, so perhaps Gustin will get the chance to star in one of these movies after all. What do you think?