Will they added the Bandana skull in Halo Infinite I would ask one of the developers on Twitter but I do not know any of there names

At this point we don’t know about any skulls/Easter eggs in infinite. You could always make a tweet using the #Ask343 on Twitter and @Halo on that tweet and it might be answered in the next #Ask343 video they make! (If you didn’t know, #Ask343 is a new thing they’re doing where they answer your questions on Infinite in a YouTube video)