Seeing Messi in the Premier league and in sky blue would be wonderful but he would cost hundreds of millions in wages and probably transfer fees.I didn't watch La Liga this season but he's been very average this season in the Champions League. Most football fans absolutely love Messi but his time is up, hence he can no longer carry Barcelona.
If I were him I'd see out my days at Barcelona and retire. He'd get exposed in the Premier League. Technically La Liga is better than the Premier League but Liverpool and Manchester City completely overwhelmed Barcelona and Real Madrid in the past two seasons which is indicative of the difference in physicality of two leagues. Messi still prospers in La Liga because he has space and time in a still domestically strong Barcelona side. Don't let that mislead you. His time is up. Stop dreaming.
We have bigger long term priorities, we must replace Kun long term, we must sort out LB once and for all, we must get at least one more high class CB.
Messi would be coming for the wrong reasons, he is pissed at Barca, unsurprising , but would he really want to come to us at 33 for footballing reasons?