A trademark for Incandescent Arcana (白熱のアルカナ) has been filed by Pokemon. It’s under the same terms as trademarks previously used for set names.
“Incandescent” means to emit light when heated and “arcana” means secrets or mysteries. Perhaps this supposed set could feature Heatran or Cresselia? So far Dialga, Palkia, Arceus, Darkrai, and Giratina all seem to have upcoming sets (Shaymin is featured in Brilliant Stars). This leaves Uxie, Mesprit, Azelf, Heatran, Regigigas, Cresselia, Manaphy, and Phione.
We usually discover trademarks five to six months before they go into use, so this may be a set releasing around May or June in Japan. This takes us half way through the year, and perhaps half way through the Gen IV Legendaries!
February will see the release of Battle Legion, which will be a special set. It’ll also see two decks featuring Lucario VSTAR and Darkrai VSTAR.
Time Gazer and Space Juggler, which we discovered in August, will obviously feature Dialga and Palkia. We’ll probably see them release around March.
In September we discovered a Dark Phantasm trademark, which may feature Darkrai. That should also release around March.
Lost Abyss is also an upcoming set and could feature Giratina and the Lost Zone. We’ll likely see it in April or May.
And then we have this Incandescent Arcana, likely releasing around June.
2022 will obvious be the year of Diamond & Pearl sets!