Oracle is like the gold finger, everything they touch turns to gold and dies
As an ex-employee of Micros' retail division in Solon, Ohio, I can honestly say they do not need the help here. Micros (Retail) is already rotting from the inside out.
I do not expect Oracle coming in to save the day. There has already been too much brain drain and customers are already dropping them as a vendor. Big customers. Think $10 million and larger contracts, poof, like a fart in the wind.
Micros has some really good products, it is the services that kill them. While profitable, they add an exponential amount of work to the delivery and open them up to liabilities. Oracle will likely come in and say "one size (ours) will fit all." And that would probably be the best for everyone.