You had a stupid idea. Superblocks are anything but great. Even if there is no premine, suppose we have a real coin that sells on exchange. As soon as there is a superblock, the amount of coins in circulation increases disproportionally, devaluing all those coins already in circulation. Suppose I am a small miner and I have spent considerable effort mining several regular blocks. Then there comes a guy who got a superblock and voila — the exchange rate drops and now my efforts are worth nothing. A coin for small miners, yes.