I was thinking maybe the game starts and you are a kid who witnesses his father get killed fighting for a certain faction (it could be aldmeri dominion, stormcloaks or the imperial legion depending on your race)
The game will be connected with your save files from skyrim so if in skyrim you wipe out the stormcloaks they are non existent in TES 6. It could be set ALL over tamriel. Their could be a different main quest line for each country but they all fit together into one major main quest. Like for valenwood the main quest could be that valenwood has their own rebellion and the rebels drew courage form the stormcloaks and rebelled against whoever controls valenwood, it would be a bit like skyrims civil war quest but more diverse and with a deeper and more meaningful plot to it. The game should be set shortly after skyrim (maximum 2 years). Maybe an appearence from your previous character, as general tulius's or ulfric stormcloaks right hand man or second in command.

Anyone think this is a good plot? Feel free to post your own plot or improve on mine as this topic is for ideas for TES 6

Might be hard to stand out as a hero while the Dragonborn still walks the earth. The world would feel more inclined to lean on him/her rather than you; due to obvious reasons.

Unless of course he/she turns evil

I know but as the dragonborn is jarl of solitude/high kings right hand man he will not be as involved, i meant he would show up as a npc who has gave traveling skyrim to settle down with his/her wife/husband and children. Maybe he could be availible as a follwer if he favours you.

Also i forgot to add that a karma and reputation system would be good.

Based on the trend by Beth in the past, I wouldn't hold my breath expecting to see Stormcloaks, Altmeri Dominion or Skyrim in TES 6. Each game so far has been a pretty clean break from the last. And, seeing that they went so open-ended with the CW, and created strong feelings among gamers between the two sides, any attempt to go back in post-war would probably be suicide on Beth's part. At this point they will almost have to start clean somewhere, I would think.

There is a thread for TESVI suggestion.

Also, I disagree with all of your ideas.