I don't think it will be easy for modification to occur in bitcoin system. The original bitcoin blockchain set by satoshi nakamoto is what all developers have been working around it, and if there is any modification then it is what new altcoins blockchain is implementing.
of course that's not impossible, but I think it will have a significant effect on bitcoin prices. Well, if it needs to be modified, I hope that it is for the good, and can make the bitcoin price higher, and make bitcoin more necessary.