I know that time travel is all but impossible, is there any possible way for beings/individuals from alternate timelines to appear in “our” Forgotten Realms timeline?

Hey Ed, another obscure Realmslore question for you! I know that time travel is all but impossible in the Realms, but is there any possible way for beings/individuals from alternate timelines to appear in “our” Realms timeline? Thank you! According to a handful of sages and the clergy of certain deities, yes, but I’ve never met any.#Realmslore

— Ed Greenwood (@TheEdVerse) February 18, 2020