Isn't Ichigo's Bankai the simplest Bankai?

[ju_one06]

Yeah..simple one..
but his power as captain squad..

[Zen_Shingami]

Its simple but pretty strong. Compared to the other Bankais it does look unusually simple xDD

[Airgiod]

I can't help but wonder: If his zanpakutou has only two stages that we've seen so far, is it possible that sometime in the future he might achieve something greater than bankai? A power level only Hollow Ichigo can achieve??