Complex sentence: Cable and the New Mutants (Sunspot, Warlock, Boom Boom, Cannonball, Rictor and Wolfsbane) are attacked by Franklin and an adult incarnation of the team, including Cypher, who was killed during a New Mutants adventure months earlier.
Split into simpler sentences: Cable and the New Mutants (Sunspot, Warlock, Boom Boom, Cannonball, Rictor and Wolfsbane) encounter Franklin and an adult incarnation of the team. Surprisingly, their number includes Cypher, who was killed during a New Mutants adventure months earlier.