Opera will use Blink
<i>“Our ambition is to contribute Opera’s browser engine expertise to Blink, ranging from the implementation of new web standards to improvements in existing code.”</i><p><i>“Our ambition is to contribute Opera’s browser engine expertise to WebKit, ranging from the implementation of new web standards to improvements in existing code.”</i><p><i>“Our ambition is to contribute Opera’s browser engine expertise to Gecko, ranging from the implementation of new web standards to improvements in existing code.”</i><p>Funny how adaptable these are. If you can't decide, just abstract away.