I've been through 2 End Portals and both of them led to the same End island. The dragon was still killed, and I think there should be a continuous restart for the End Dimension. This is also a basic goal and I'm sure there's people who'd agree with wanting to kill the Ender Dragon and having a restart for the dimension (Or Portals leading to different islands with a new dragon?).
The end does get reset. when enough players request it, it will be done. What mod pack are you on? There may be other ways to get a dragon egg and or a dragon.
Depending on the pack you are on and if it has Harcore Ender Expansion with that mod you can revive the dragon but the bad news is you will need to find out who kill the dragon first as it drops Dragon essence neccesary to revive it and also the dragon egg is needed but i know that with modded minecraft there are ways to make dragon eggs
With pack with this mod... maybe have a crafting recipe to use the egg to get the Dragon essence. Also if your pack has mariculture, you can craft a spawn egg
And if it does not have it a Recipe to make a spawn Ender Dragon egg but i already see some problems with that i think @Crhymez and i know what [DOUBLEPOST=1419913250,1419912857][/DOUBLEPOST]But with the same restriction quarry have that you can only place them in farm world is there not a way to make so you can't craft it in the overworld just the end "worth asking"
TDT can craft dragon eggs. Beside getting the bees theres no need to reset the end. Endstone is also craftable.
Dragon eggs are easy to get, you can somethimes find 4+ in one loot chest. i will hop on and see if there are other ways
