@DNA
If you have good sources tell us what they are or you have no credibility.
Anyway, IMO if Lost World comes out we're the meta will suffer more than with SP rule. Unlike SPs, Lost World cannot be countered, as you play when the conditions are met and win. Next, only about 4 cards can use Lost World, Absol G lv X, Palkia G lv X, Gengar Prime, and Giritina (lv X and Broken-Space Blow.) The easiest to get (Giritina) can barely get set-up. Further Gengar has Mew to second turn remove two, and Spiritomb/Vileplume lock, so even if it has a slower start it can easily slow the opponent to a crawl and then conquer the game. Can these be countered? Certainly, but it will be very difficult, and we'll face the same problem SP has only more centralized. Further after Worlds (if POP sticks to their promise and cuts to RR) then we'll only have Absol and Gengar (Gengar being far superior) and overly-centralizing. These are the exact reasons why it is both unwise and overly destructive to release Lost World, and thus I hope that Lost World is cut.
EDIT: (Also Porygon-2 can easily be teched to get the stadium)