This developing El Nino has lost some steam but the MJO is in active phase so there might be another opportunity for another westerly wind burst to trigger a Kelvin Wave. Also its not mention often but there is some amount of correlation between ENSO and PDO and since January 2014 the PDO have enter a positive phase. The current PDO index is 1.80 recorded in May, so this could be the sign of a warm phase have started.