Mtyhic planeswalkers without ultimate abilities may seem underwhelming, but the passive ability on this new Bahamut planeswalker is quite interesting.
You can play him earlier than turn four using mana accelerators and add four more loyalty counters in just two turns with the help of Kasmina, Enigma Sage. Then, you could turn him into a 7/7 indestructible creature on turn five. This requires a lot of set-up, but totally possible.
Currently there is no clear indication which decks and formats would like to play it except commander. Assuming it's going to be an interesting planeswalker that doesn't impact formats too much, it should go down in price to about $10 a piece.