Yes it could happen but i doubt very much it will happen the short to medium term, to actually make bitcoin obsolete would be a achievement.
Are you sure, it could happen in future, because i don't think that it will be happened, What the benefit for Bitcoin in it?
Secondly, now Bitcoin is a brand name, if bitcoin name change and make another name, so it will create difficulties for bitcoin,
and on the other hand, if Bitcoin will be change from cryptocurrency into Fiat currency or an other cryptocurrency.
So what the benefit from Bitcoins?
Now Bitcoin is already successful brand.