After thinking about things that are going behind the scenes of this movie.
It probably is Kal
The reason I suspected there may be a possibility that it is bizarro is, that I have a huge respect for Snyder having the balls to not play It is safe in his movies.
He has a superman that snapped the neck of his enemy;
When brainstorming on who would be the next villain in the next superman movie, picked batman;
Killed the ultimate least person to die in a batman v superman. That's like killing Ironman in Spider-Man homecoming; etc
Snyder doesn't pull punches. As a result, it leaves his movie's fans divided, therefore costing WB less $$$ had he chose to play it safe
And give ALL the fans what they wanted. By him making unorthodox decisions, it's not making the $$$ WB is Hoping for.
The buzz we've been hearing about zack taking out JL logos on his social media account, and finding out that whedon's reshoots are substantial
And not just finishing the movie for Zach, I'm thinking WB decided to play it safe and have whedon make a the movie that would cater to the masses.
So if it was still Snyder directing this, I would still have doubts that this is superman, but may be bizarro. That would actually be kinda bad *** and a huge twist in the end, that after this superman appears and help the JL, after the credits roll, it ends like how the comicbook teases his return...it shows a silhouette of a figure resembling Kal. End
Then the next MOS movie, we see the return of Kal with the long hair and black suit.
If we don't see Kal in JL with the long hair and black suit, In a way, it's disappointing and wasted opportunity specially since they went with the death and return of superman to end batman v superman.
So Im thinking, with batman v superman not even making a billion, which it easily should have made, with Snyder being taking off the reigns, WB is gonna play it safe...so I'm thinking, this IS Kal in JL.