I would like to share with you all the spreadsheet I made and I'm now using.
It shows all currently existing heroes and the date of release of all of them, the event of the release, the cost in CP.
And you can indicate if ou have this hero or not.
This will show you how many CP you still need to get all heroes.
You can add the level and class of the hero you possess.
It will show you the time needed to level up your heroes to next level aswell as for level 14.
With all this infos, the spreadsheet will show you on separate tabs the PvP bonus you'll get from heroes (currently I only have the infos for level 300 Agent, so the bonus shown only works for this level of agent)., and the cost in CP you'll still need to fullfill various goals in season 2.
I used another blog found on this wiki for the PvP bonus calculus.
So I would like to thank Paul_de_Senquisse for his own blog (follow the link it's an amazing work he made : http://avengersalliance.wikia.com/wiki/User_blog:Paul_de_Senquisse/PvP_optimization:_Who_should_I_level_next%3F#comm-358002)
And if anyone can help me gather infos on the PvP Bonus for levels lower than 300, it would be great.
Here is the link to my spreadsheet, I have a copy of it on which i'm working so feel free to do all you want on it !