Multiple branded email domains in same Eloqua instance?

Hello.

Our current setup includes a branded, DMARC compliant email domain in our instance.

We want to study the possibility to have a second branded domain (NOT a subdomain, as the brand will be different) in the same instance. We assume that this second domain cannot be DMARC compliant, but this is ok for a start.

My question would be, how can we setup this second domain (if it is possible)? Can we reuse the bounce back address or we need a second one, and what implications in terms of reputation and deliverability we may face with this setup?

Thanks a lot in advance.