Final Boss

I think it would be really cool to work towards a final boss that we would be able to create once we beat all the previous bosses. For example, once each main boss is beaten they drop their head. Then with all the heads you could summon the final boss much like the wither is summoned. The final boss could also have aspects similar to all previous bosses. For example, the final boss could fly around like the ender dragon whilst launching explosives that resemble its head similar to the wither. Personally I believe this would be something really cool to work towards in late game and would provide an incentive to go do all things in the game. I hope you consider my idea.