Blizzard has shared a Blue Post explaining how players can recover accounts for Classic, get In-Game help with character issues, as well as additional clarity regarding the rules for upcoming Fresh Start realms.
Blizzard
Gather your allies and heed the call to arms as Azeroth prepares to face the imminent threat blowing in from Northrend. But if you’ve been on a hiatus, you may just need an assist getting back in fighting shape.