displayName from Workflow with IIF

Target Value:   [//Target/DisplayName]

Conflict Filter:  /Person[DisplayName='[//Value]' and not (ObjectID='[//Target/ObjectID]')]

ProperCase(RegexReplace([//Target/FirstName],"[^A-Za-z0-9]",""))+" "+ProperCase(RegexReplace([//Target/LastName],"[^A-Za-Z0-9]",""))+" CTR"

Now before just a tie breaker can a Middle Initial be entered via an IIF so a null will be if there is no MI ?