Since messi is not yet extending his contract with PSG and this kind of rumor will always come probably until he ends of the summer transfer season. it's caused by messi is not yet getting a club since he has been rejecting a new contract from PSG. Messi is as big as ronaldo. Any news about him will be consumed widely by so many people in the world. barcelona is also spreading the news about its president already making call to the messi. that was making the public believe if messi will be back again in barcelona.
Lionel Messi future still speculation after not yet extended contract with PSG and he will be free agent several months later, due FIFA transfer regulation, Lionel Messi can speak up and reach agreement deal with any team after his contract left few months later with PSG and there are not forbidden for Messi accepted offering for any team.
Talking about Lionel Messi chance return back to Barcelona seems little possibility, Barcelona has financial problem after last week failed registering young kid Gavi to main squad. But if have transfer deal for selling Ansu Fati rumored not happy with current situation after more spent time in the bench could possibility Barcelona have enough fund for recruiting Lionel Messi.