@EA_Aljo why would the team create such a restrictive event? I'd venture to guess that nearly no one has 20 X-factor players in their collections, the set to build has a one month cooldown, and there isn't really another truly viable way to build a team and this late in the game, it's not worth trying.
The premise is good but the reason why the base card champs was so good, for example, was that everyone was able to easily build a team with what they currently have.
Can you ask the team to open up the lineup to something like x-factors and base cards?
Otherwise, this will flop badly.