The Binding of Isaac: Rebirth+ features detailed

The developers of The Binding of Isaac: Rebirth have detailed the features coming in the upcoming expansion, The Binding of Isaac: Afterbirth+. Apparently it was initially thought that Afterbirth+ would just be a small DLC with some developer tools and a few new items, but in an official blog post it seems there will be lots of new features:
-55+ new items
-new final chapter, boss and ending
-new playable character
-greed hard mode
-daily greed runs
-5 new challenges
-loads of new achievements
-a few new bosses and other little editions

On top of all this, there will also be developer tools added to the game as previously mentioned. In the blog post, there were a few other updates mentioned. This includes a details of a console release for the game, as well as confirmation that the new expansion will be making its way to consoles at some point, albeit likely without the developer tools.

Finally, there are also a few new details about a new spinoff game, entitled The Legend of Bumbo.

"Bumbo is a difficult game to compare to other games but I think the best would be to call it a cross between puzzle quest and Isaac mixed a bit with magic the gathering. It's probably good to get that basic description set in stone before we go too far into teasing and too many of you think we are doing some wacky JRPG type Paper Mario game.

"It's a randomly generated, puzzle based, turn based, combat driven ball of chaos and poo! And it's coming together quite nicely.."

The Binding of Isaac: Afterbirth+ is set to come out some time this year, but a concrete date has not yet been set.