I think they would need both: Naval is a mode w/ lineups, and additions in such modes - esp. at end-of-line - place high importance on providing players options to create them. The Bismarck-classe sit in an awkward spot in relation to that, being above the capability of the majority of battleships the DE tt can receive – because of that, it seems unlikely that either will not be freely researchable.
If you mean Gneisenau, her appearance in the 2.7.0.55 leak indicates she’ll be added w/ the same guns as Scharnhorst:
Spoiler
Gneisenau
Scharnhorst
These would be sidegrades to Bayern, or maybe to Scharnhorst, but I doubt they would be comparable to the Bismarck sisters. And would once again be for lineups below them, like the other WW1 battleships.
This one has the reverse situation of the previous, it 's addition is predicated on the idea that it 's superior to the Bismarck 's to the point that it 's incomplete status would not be an obstacle to implementation, since w/o it the techtree would not have a comparable-power platform to fight the ( completed ) ships of other nations.
And so, would again not be forming a lineup w/ the Bismarck types.
I don’t think we’d ever see either, DE techtree already predicted to need incomplete battleships just to fight built ones like Iowa, and US already having the option of Iowa.
More likely imo is that we’ll see other kinds of warship, which are not yet present ingame, start to turn up when the options for complete and incomplete battleships classes to move upwards in capability dwindle into single ships, per techtree. Rather than trying to move into completely unbuilt paper projects.
There are a number of battleships DE can yet receive yes, but very few w/ post-WW1 capability( effective AA, modern torpedo defences etc. ). Which makes it seem unlikely that Bismarck or Tirpitz would not be in the techtree, since they would be the sole option to form a lineup of roughly equivalent capability w/ the other - very important to the devs as we reach the end of top Rank additions, as we’re seeing in Ground.
Not this image again 😒
It 's utterly fictional, created by a defense blog in the early 00’s ( Pigs Forever? Part 1 - 4 F-111 Life of Type; F-111 Missileers; Supercruising the Pig; Alternate Force Structures ) as part of their campaign to sway the Australian armed forces away from their plans to retire the F-111C. It was never seriously considered at any level, and noone will ever be saltier abt that than the blog 's owners.