The implication of the lore is that Alduin's powers are fire based but isnt that rather limiting for a dragon god avataar?
I keep thinking of Bahamut from FF8 - that dragon had umph with its Megaflare. Can we expect some sort of similarities with Alduin? Like a long range fire breathe attack? Or perhaps he will be able to cause an Earthquake but that may crash the game with the physics game engine's capacity to calculate excessive interactivity. Will Alduin use high level dragon shouts available to the player or have unique ones of his own. And if he has a unique dragon shout, if the player can absorb Alduin's soul then will he be able to learn it? Kind of like an MQ reward. Will he create tornadoes in his wake? Or cause mounts of lava to erupt from the ground? How will he outshine the other dragons in power?
What do you think Alduin's abilities/dragon shouts will be?