Are there any plans to expand this chart beyond level 139?
I spent the time to level up heroes from level 1-100 and checked xp required at each step. Please review levels 36-39, 50-59 and 119. You will probably be shocked that it's no simple equation. ;P
Kudos on putting the info out there, the amounts are really not that much different overall.. it starts to add up though. I have a 4000 xp difference where my data stops at lvl120. Keep it up!