Mike does, like, 90% of Rebellion in some capacity. If he just does some rap verse over the bridge, it's covered completely. Same goes for Faint, just with the chorus, too.
1. The Requiem
2. The Radiance
3. Burning In The Skies
4. Empty Spaces
5. When They Come For Me
6. Points of Authority (Demo Version)
7. It's Goin' Down
8. Until it Breaks (Shortened (Through Chester's Part))
9. Waiting For The End/Hands Held High (Apaches Intro w/ 'Until It Breals' v3)
10. Castle Of Glass/Kenji (Bridge w/ 'Wisdom, Justice, and Love' Speech Samples)
11. Sorry For Now
12. Roads Untraveled
13. Numb (Piano Version)
14. Final Masquerade (Acoustic Version)
15. Where'd You Go
16. Invisible
17. Welcome
18. High Voltage
19. Remember The Name (Shortened)
20. Faint (w/ 'Papercut' Chorus + 'xx' Bridge [Alternate bridge verse])
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21. Rebellion (Ext. Intro; Grudgematch Bridge)
22. In The End (Crowd Sing-A-Long Version)
Them going forward as a five piece makes the most sense to me. I can't see them getting a new singer. Chemistry wouldn't really be there, it'd probably feel weird etc.