One of the old powers that seem to be left is Poland. Poland is in Abe a small nation defeated by the Teutonic Order. However Poland seems to be diploannexed a lot by Hungary or TO early, an especially if Hungary diploannex them in the early 1500s (which is not unusual) the power in central europe is quite upset. I'm not saying Hungary shouldn't go for Poland, just saying they shouldn't go early. I'm thinking that since the Lithuanian empire in Abe history was pagan, that was probably because they was not influnced by the poles, if they were not influenced by the poles, the poles was probably not even before the Teutonic victory a major player in the area. If I remember medieval history correctly Poland was sometime in the high middle ages split in a couple of independent duchies. What if Poland never managed to reemerge, and all of Poland outside Teutonic Order would be minors. (This would of course make the TO go for a crazy annexation war and gain a lot off bb and screw up the whole region, but Hungary could get events for protecting the polish duchies, making TO and Hungary fight over Poland for a long time).