Board Thread:General Discussion/@comment-25660412-20160227095525/@comment-26812877-20160301050125

Oh yeah. Forgot retcons as well. No terrible retcons either. Especially when they don't make any sense at all, have very little to no explanation behind them, and are unnecessary to put in. If the Plumbers were a disbanded top secret Earth organization, keep them as that very organization; not suddenly make them an established intergalactic law enforcement agency right out of the blue. If Gwen was established as being a fully human sorceress, keep her as a fully human sorceress; not suddenly make her some human/alien hybrid right out of the blue. No anything like that.

Overall, just keep things consistent. No major plot holes and continuity errors, no terrible retcons, no pointless filler episodes, all that stuff.