I need information when is the loadout in the case decided is it already defined when you get it even if you dot open it?
To be accurate i want to know, if i start accumulating tons of case right now and open them after the next merc release, will i be able to drop some loadout for this merc ?
About Equipment cases..
Case contents are resolved during opening. But the other thing entirely is the set of possible loadouts, which varies depending on case type.
Normal, non event and always available, Standard/Expert/Elite cases - they always have all the mercs, including those released after you got the case.
Event cases, like CW/WtD, contain only mercs released at the time, so you won’t get a Turtle, Aimee or any other future merc out of them.
[quote=“MarsRover;152407”]Case contents are resolved during opening. But the other thing entirely is the set of possible loadouts, which varies depending on case type.
Normal, non event and always available, Standard/Expert/Elite cases - they always have all the mercs, including those released after you got the case.
Event cases, like CW/WtD, contain only mercs released at the time, so you won’t get a Turtle, Aimee or any other future merc out of them.[/quote]
Answered my question thanks 
Actually I’m not sure what is the deal with event Elite cases, those that are normal Elites except having 10% chance for an event skin. The 10% is like I described - only for mercs available at the time, but what about the other 90%? All mercs including future ones, or only current?
Standard elite cases are updated to include new mercs.
Event elite cases are not updated and will always contain the same mercs/loadouts until they are opened. This includes standard, non-event cards.