Anything can happen.
The original Articles of Confederation required unanimous consent amnong the 13 states in order to be changed. The constitutional convention that wrote the current document arbitrarily decided that 3/4 would be sufficient.
Does anyone really think they can control the outcome of a convention?
No one can really control the convention, but it’s the ratification procedure that won’t change...the convention could totally throw out the current constitution and write another one, but that doesn’t mean any of the changes will actually be ratified by the states....