Do we plan on including the remaining 4 at latter stage or will this be the final version till a new tank comes in?
Jane's refers to Al-Khalid 2 as Al-Khalid I.
Since 2009, AK production has been extremely slow due to a number of reasons (mainly budgetary constraints). The 4 upgrades could be applied later when AK 2 undergoes some form of half-life upgrade (which is many years / decades away). Don't expect anything soon.