Some modifications have been published on Legaue of Legends test servers. You can find in the following article changes relative to the June 3rd PBE patch.
Prehistoric skins splash art is now available and will be shared by the 3 skins :
HUD UpdateAll is explained in this official article !
Balance ChangesTo be sure not to misunderstand the numbers and put these changes in a more global context , don't forget to check the summary of the 5.11 cycle changes on the PBE !