Only way is with bitcoin fork to imlement masternodes. gl!
Let's focus on decentralized BTC/DRK exchanges that are mutually beneficial to both coins.
Actually, side chains have the potential to provide a workable solution. The trouble is its about 2 years away. That in crypto is a lifetime.
edit
that's without any bugs or extended testing.
Perhaps but side chains have security and centralization issues as discussed by Peter Todd.