Maybe we will get an other god at the global release anniversary. But I don't thin it will be Obelisk. Obelisk probably going to be the last added god. We may get Slyfer or Ra Sphere mode.
An yet, Blue-Eyes Shining is worst than them. Obelisk is the only powerful Divine-Beast in the end.
4K base atk, the only one that can't be targeted, has a "raigeki" effect and don't have any stupid noob condition like Ra and Slifer that limit the plays or affects negativelly the owner of the card.
I have a pretty consistent BEUD deck, I included Shining Dragon on it and I've been able to summon him fairly often, it's ability to negate Enemy Controller was won men a few duels.
Also, you could build a fairly consistent deck for Ra with destiny draw on a LP recovering deck, just add 3 copies of Ra's Disciple, cards like double summon and celestial transformation so you can summon 3 Ra's Disciple and then summon Ra on the same turn.
Anoymous
Lord Pancake
