Since it is general consensus that old whitebeard was not the actual world strongest man in marineford making world strongest title not omnipotent then it means that it should also apply to kaido who was in his prime and was known as the world strongest creature but if the final villain (probably imu) who is alive and is probably at full power already is stronger than kaido doesn't that mean that kaido was never the world strongest creature in the first place. so there are 3 options
1. world strongest title are meaningless and are given in world and are not 100% accurate until oda himself says so outside
2. world strongest title are accurate meaning old and sick whitebeard is stronger than everyman including mihawk, akainu and so on in marineford before he was stabbed
3. The final villain is not yet at full power. since it should be obvious that blackbeard is not the final villain (headcanon)
1. world strongest title are meaningless and are given in world and are not 100% accurate until oda himself says so outside
2. world strongest title are accurate meaning old and sick whitebeard is stronger than everyman including mihawk, akainu and so on in marineford before he was stabbed
3. The final villain is not yet at full power. since it should be obvious that blackbeard is not the final villain (headcanon)