Thanks for your reply @Muppett & @Hex
Ok so to explain this a bit further... The MA advised lodging the nomination and the application with the old ABN acting as a trustee for the new ABN. I am not allowed to view the nomination documents as my company has a very strict policy; I just know that we had to supply financials for both companies and they requested further documentation last month. The immigration agent ensured me that, as long as the businesses are associated entities and are sharing the same management, the nomination ***should*** be ok. I'm just getting frustrated because a lot happened in my company in the last few years (change of ownership, management, ABN, trading name etc), and there is no transparency on that, so I worry that it will affect my application. I see that most nomination get approved within days, and without asking for extra documents...