OK then. It's pretty much your same basic idea behind all the Digimon series. The kids (who will start out human and either stay that way and gain partners or become digimon as they enter the digital world) get sucked into the digital world when they take care of their digital pets juuuuuust right and activate a hidden glitch that warps them into the digital world. Once there they are stuck until they defeat the big bads.
Like its predecessor, this one will be a sort of season 0, so no humans have ever entered the digital world before. This is where my idea of having the kids turn into digimon came from. The digital world has never had to deal with humans before so it changes them into digimon. Either way it winds up working out would be fine, I just thought that idea made sense in this context and, ya know, would be super cool >3>