It is understood the league has told its clubs that playing the remainder of the 2019-20 season at between eight and 10 neutral venues is the only way it can be completed.
But Barber says he remains opposed to the idea, and said: "I can't be in favour of something which disadvantages our club. We want to see the league out on a fair basis. If we were relegated (on that basis) then that's one of the consequences of playing in such a competitive league, but we would be disappointed if we were relegated if that competition changed after 755 of games had been played."
Barber added: "We haven't seen the completed plan. At the moment we have got certain pieces, but not all of the pieces".