Liverpool and Byaern Munich may still be quite promising but Arsenal personally I still can't put more hope. Because well Arsenal is Arsenal, at least they have to prove first that they are EPL champions, after that they can pursue UCL. Realistic right? because Arsenal must be able to conquer the curse of the English League first. If it's not a curse, what is the correct name for them? hmmmm 
Liverpool, Manchester City, Barcelona and Bayern Munich are going to be teams to be watch in coming season because now they are having good depth into their squad with things are also into their way with they are working on their concerns which give them problems in last season.Liverpool is surely going to be one of the best team for taking title but with the workout of others is also creating good challenging situation because all teams are having enough sources to keep things on level while Arsenal is still looking for fixing their problems which hurting them badly in last few years. Arsenal mentality is always problem for them which keeping them away from trophies if Mikel Arteta able to bring balance and good rotation then surely Premier League could be more challenging for top teams otherwise again two teams fight for title with Arsenal will be in top 4.