It looks awesome!
I dont have a suggestion of what plant really, but an observation, there's 3 leaves showing, they look awfully big and broad for a seedling.
My first thought was ginger/canna at a glance, that family, but I could see spiderwort family too.
Whatever it is, time will tell, and I'd think it's pretty enough to hang on to for a while, it could turn out to be something special!
