Okay, so you can FtD to punish a close-to-ground air Heat Vision. But how to you deal with air Heat Vision from the highest point of Superman's jump? I never see Superman players do Heat Vision that low to the ground.
If he MB it I don't know you might be able to still FTD it, tom will know. If it's a regular air laser and you block it you can dash in and combo him on the way down.
Air laser is extremely match dependent now I believe.