He mentioned his son's name was Lee. Seems likely it's short for Leland, in which case it seems to back up the theory that the son is the Owl from the comics.
While a super-powered or super-equipped Owl is not out of keeping for the MCU, I have a hard time seeing him as a good idea for Daredevil anytime soon. Its not so much that he couldn't work thematically, as that there are just so many seasons worth of other, better ideas to run with. Using "flying, clawed crime boss" before using Bullseye, or Born Again, or even Typhoid Mary? Seems a bit wasteful.
If they bring his son in as the Owl and he doesn't have powers, it would be a waste, imo. Comic Book Leland Owlsely was an accountant associated with gangsters originally, so they covered that aspect.
His powers as originally seen were just the ability to glide. I think they could pull that off without leaving the grounded DD World too much. His suit is a normal suit (just usually green, which was a common suit color in the 60s). I do think they'd probably make him quick to anger like the current version - it would make sense for a son angry at his father's death. It would also help separate him from that father.