Okay, you get an answer, because at least you took the effort to write your ask out properly, even if you are hiding behind the grey, sunglassed circle.
Do I, or any fanfic author for that matter, have any legal claims to our work? No, not really, no. (Although if someone took a fic, filed off the serial number--deleted the fandom specific elements--, and then had it published for financial gain, yeah, that would be a case.)
Fandoms are built on a social contract that says we respect each others work, the effort people put into their art. We don't steal or disrespect the work of our peers. By feeding people's fanworks to AI you both steal and disprect it, and we need to make people realize that before it's too late--before fandom falls apart, because there will be no more real, actual fanworks.
(i can't believe I have to say this)