"I'll just ask, will they be up to making a 3D game?"

Probably.

"I think there are more modern examples of 2D (2.5D) platformers this gen than 3D ones."

Nintendo and to a lesser extent Sony are really the only major companies that make 3D platformers with any kind of budget anymore.

BGE was not a platformer in the first place, though. It was an 'adventure' game where the gameplay was a mix of a different genres and styles: combat, photography, exploration, stealth, light puzzles, mini-games, vehicle driving, and chase sequences.

"I may not have the greatest opinion of the original game, but, just asking, wasn't the contained areas the best parts?"

Technically almost every area was contained, so I am not sure I follow.

"I suppose it's not going to happen but smaller and denser areas like the ones in Bloodborne may be the better call for this game."

Assuming the game ever comes out, it will probably have individual stage ordeals too. Having a large, persistent overworld does not preclude standard levels.

Think of BGE like Zelda and its dungeons and mini-dungeons.

"I don't have sales data, but I'll have to ask, just how many of those new IPs were successful stories."

The number of new IP success stories directly relates to the number of total new IPs created.

The Wii era had like three or four new IPs each year, tons of which were successful.

Meanwhile, I can name a grand total of three new IPs to come out of the Wii U's entire lifespan. Two were bombs and one was Splatoon.

"The last list you show me if I remember correctly had several of the top games selling just as much as the bigger successes on Wii U, albeit there could be more, maybe."

At a quick glance, Gamecube had 25 games that sold over a million. Wii U had 13.

The Gamecube also sold more hardware than the Wii U, sold more software than the Wii U, had a stronger tie-ratio than the Wii U, made more profit than the Wii U, and attracted more third-parties to the system than the Wii U.

That last one is germane to this topic because it is the only reason we are having a conversation about BGE on a Nintendo site. Thirteen years from now when there are discussions of desperate fans hoping for a possible sequel to a beloved third-party game that came out during this generation, those will not be happening on a Nintendo site because those games are not coming out on the Wii U.

"most of the exclusives Nintendo put out haven't receive a rerelease, I wonder why"

Nintendo does not want to spend money on full-on remakes when they can just stick them on the Virtual Console.