At some point, you have tonwonder when a company is offering almost too much. When Rock Band 4 was announced, it came with the news that not only will all your DLC carry over from Rock Band 3, but so might all your old instruments. That makes Harmonix's new Rock Band and inticing offer.
However, the developer really seems to be bending over backwards to please everyone. In an interview with Business Insider UK, Rock Band 4 project director Daniel Sussman, said that you may well be able to use your old Guitar Hero controllers too.
We're planning to support everything that we can: That includes all of the old 'Rock Band' controllers, and all the old 'Guitar Hero' controllers.
Our position is really all about respect for our consumers and for the money that they have spent to get into the game space in the first place. They spend a fortune on games: on consoles, on hardware, and we're sensitive to that.
We play those games too. We buy all the same stuff. A world where you need to have three different guitars and two drum sets and all this stuff is…we don't want to support that world.
This is a ludicrously bold move by the developer, deciding to use a competitor's old hardware against them. I don't know if there are any legal issues here, but if Harmonix pull this off, I'll be incredibly impressed.