Complex sentence: The next week on "Raw", former General Manager Bret Hart refused and in result, was attacked and incapacitated by Nexus, forcing WWE Chairman Vince McMahon to appoint a new General Manager, who ultimately signed all Nexus members to the show.
Split into simpler sentences: The next week on "Raw", former General Manager Bret Hart refused and in result, was attacked and incapacitated by Nexus. That forced WWE Chairman Vince McMahon to appoint a new General Manager, who ultimately signed all Nexus members to the show.