Is FFXIV hinting Berserker, Necromancer, and Chemist next expansion?

[TThibi]

Seeing as the 4 jobs hinted in the new dungeon were Thief, Necromancer, Inkmage and Berserker which all use the same weapons as Rogue, Cleric, Arcanist, and Marauder. These 4 new jobs are advanced forms of the classses rather than 4 new standalone jobs. Possibly at the end of the class quest lines a conversion of the existing classes to a Limited format specifically for new limited content like pvp battlegrounds. The divergencies already exist in game with V'kebbe the stray's split at the end of the rogue classes quest line, Clerics are forbidden to use the raise spell specifically because of necromancy, Arcanist if left alone would become a combination of scholar and summoner, and without the training of a warrior the marauder would simply go berserk. Of the 5 new introduced hints Chemist alone is a new standalone job. One of the scripted lines of the Necromancer is that we would never see her story, and that would be true if the final stage of Cleric was to be transformed into a fully leveled Necromancer.
It makes sense for SE to use in game content to show off upcoming expansion content as the fan festivals which would showcase the coming expansion have been cancelled and 6.0 would be expected next June. The showcased class evolutions are not party friendly with abilities that are large in scale, and generally overpowered
necromancer is able to summon a full party of undead, for instance. Although not party friendly they fit the template established by Bluemage nicely.