It's been at least 2 months I haven't visited this thread and I realize that a Abnett & Lanning omnibus for Guardians will be released soon. I bought the 2 complete collection last year collecting guardians 1-25. Are the extra contained in the omnibus (ignition 1-6, devastation 1, annihilators 1-4 and earthfall 1-4) considered essential material ? Should I be upgrading just to get these? Thanks for the help guys!