The horror! The horror!
Of course that's not going to happen.
Article One of the original Bill of Rights is still out there, though, waiting for 27 or so more ratifications. If the proposed amendment with its requirements for numbers of Representatives in relation to the total population went into effect, the number of US Representatives could swell into the thousands.
Also still waiting are the Titles of Nobility Amendment (if it hasn't already been ratified already as some claim) which by one reading could strip US citizenship from Colin Powell, George HW Bush and other eminences and the Child Labor Amendment.
Nowadays they put time limits for ratification into the amendments so proponents of the feminist ERA or DC voting representation in Congress have to start all over from the beginning.
Assuming the necessary 25 states or whatever ratified next week, which isn't going to happen, those with existing titles would be unaffected. Ex post facto and all that.