Originally Posted by psylockolussus
IMO, they don't even have to deal with those family connections. It would just make people question about the continuity. Besides for shock value and keeping the movies close to the comics, I don't think it would really help the series.
If they are bringing in multiverses and alternate realities, then this could be a perfect way to introduce Polaris, Quicksilver and Scarlet Witch. We don't have to wait for them to grow up, they can be his children from another reality who are already adults and cross over into the film's reality.