I wonder how they´ll introduce Batman to MoS.
You think Lex could be responsible? He needs introduction and he is a good villain that can be used in JL as well. I think maybe he will be in this one like a teaser, and he will appear in JL or that he is the main villain. If the latter is the case then we won´t probably see him in JL but in MoS 3 or JL 2 or 3.
Don´t you think Lex is a char that has to be introduced early?
My hope is that they use mainly the Riddler as the villain in the Superman/Batman movie(that's what brings Superman and Batman together). Lex is the good guy for most of the movie, but it's revealed in the end that he set everything up to get elected president. He's still the president at the end because of a lack of good evidence, but it still sets up him to be the villain in future movies.
Here's how I think it should go down.