Your legendary chest value with be almost 100% in the legendary. What should I do with my 2.0 veteran rewards? If you want more than one 10k hero/release, re-roll 0 or 1 times. Keep 1 rare chests or don't reroll if you are short on gold (but you probably won't be post 2.0) Keep epic chests if the chest has 2 rares, 2 epics, or 1 legendary. Keep rare chests if the chest has 3 rares or 1 epic/legendary (regardless of duplication) Keep common chests if the chest has 2 rares or 1 epic/legendary (regardless of duplication)
Keep any chest containing a rare or better item you like.