Top Gear has an article about the Nissan Pulsar (Versa?) Nismo at the Paris Auto Show. What caught my eye in relation to the Micra appears below:

Quote Originally Posted by Top Gear
Nissan’s motorsport arm Nismo has taken the sensible C-segment hatch and kickstarted its heart. It’s not yet clear precisely how much power it has extracted from that 1.6 litre four-cylinder turbo engine up, but our best snooping revealed an output somewhere between 250bhp and 275bhp.
Same engine displacement as the Micra's. I wonder if Nissan could squeeze it into a Micra Nismo? Even if the engine doesn't come over, some styling cues may transfer to the Micra eventually.