Maybe they can have Chester as a hologram. Because Chester and the rest of LP have been 3D scanned a number of times. So Chester's likeness is forever saved as a digital copy. The hologram thing might be something they can do on some shows as a tribute to Chester.
Linkin Park as a band was never about just one member. It's all the members together that became Linkin Park. That's what makes them unique. And LP as a band always challenged themselves, including changing their sound. But Chester was such a huge part of the band. So it will be different, and that's LP to me in some way.
And I'm 100% sure that there are recordings of Chester and lyrics that he wrote. I think the next album will be a tribute album to him.
The next thing from One More Light would be to release the song One More Light as a single and do a tribute music video of Chester. Similair to what they did with Talking To Myself.
Whatever the band decides I will support that. All the songs with Chester will always exist, no one can take that away.