That's like asking Xavi or Iniesta if they would join Madrid. Eto'o probably loves Barca even more.
All the talk that he left for money is rubbish. When pep joined he wanted him out, he stayed though and was essential to the team. Season finished but pep still wanted him out. The club handled it poorly though as they first did not offer him an extension and then did offer one (through sms) and an insulting one. They did this to wash their hands off responsibility. Offer was insulting in terms he didn't get any improvement to his contract while all/most key players got theirs. Some even twice in few years.
Club wanted him out and that's the only reason he left. Pep said so himself ffs and many times so others who say otherwise are either thick or just hating on Eto'o.