That is a HUGE Rights Issue to raise KES 13bn but a large chunk will be the conversion of Preference Shares to Common Shares so do NOT expect NBK to get a huge boost in it's Shareholders' Capital.
The good news for NBK is it will not have to pay Preference Dividends to NSSF but it will have to pay common dividends. The bad news is that NSSF will have a larger direct say in NBK due to the Preference [non-voting] shares to [voting] Common shares.
Can NBK become a Takeover Target? Yes, but only if NBK allows it. Will CBK allow NSSF to own more than 25% of NBK? That needs to be seen.
Greedy when others are fearful. Very fearful when others are greedy - to paraphrase Warren Buffett