Scoot may Relotead Total Drama is a replacement for Courtney Duncan

What are toi talking about!? Total Drama Reloaded is the new season and it is not replacing the old couple DxC.

and because it can not replace Scott Duncan??

The characters that were announced are believed to be fake, so the names might be fake too. But the character Scott will be similar to Duncan but he will still have his differences and they will pair him with someone completely different than a Courtney persona.