Unlike all the other banners, Peppercat is ALREADY in the standard pool.
It is likely to be a trap banner where Peppercat's rates are boosted, and that's about it. It is scheduled to start as soon as the Super Battle: Yuuki event ends.
Edit: It IS a trap banner. See Medarot Gatcha for rates, except Peppercat is 1.2% instead and all other Medabots having 0.058% as their set chance. Everything else is unchanged.