I'd actually like to start with a new character into a full fledged story with new abilities and classes. And then meet my old characters as legendary guardian mentors in the new base of operations, teaching me and giving me quests until I earned their respect. They should tell stories of their (=my) various battles in Destiny 1 and maybe will award me some of their legendary gear from old times, when they think, I'm worthy. You should be able to choose some pieces from your old arsenal and the rest should be displayed in their armories as "treasures from the past". Destiny should evolve as time passes; by simply rolling out new content to the existing core game, we'd still be tied to its limitations (balance, sub-classes, overall handling) IMO.