Dynamite,
Hopefully this helps further, and if you see an error let me know. I know my way around a balance sheet, but I would never say I'm an accountant, so maybe I made a mistake.
https://www.sony.net/SonyInfo/IR/library/presen/er/pdf/18q3_sony.pdf
(Look on page 2 F-1)
You will see cash and cash equivalent, and you will see market securities. You add those numbers up and you have a good idea of liquid assets that can be used in a fairly short period of time. Of course, it doesn't mean they can't sell other assets or give assets to make a deal happen, they can even finance the deal, no stock or cash, technically. After you add the numbers together, convert from yen to dollars, and you have a rough estimate of what they got as far as cash type assets. Again, this is just a rough estimate, they could in theory have a security that matures in 6 months, but many deals take 6-18 months to get done anyway. I would say its safe to say they have $13-25b to play around with but they would probably would never go to the top end of that range.
Marketable securities are liquid financial instruments that can be quickly converted into cash at a reasonable price. The liquidity of marketable securities comes from the fact that the maturities tend to be less than one year, and that the rates at which they can be bought or sold have little effect on prices.
https://www.investopedia.com/terms/m/marketablesecurities.asp
TTwo in theory would only represent about 2% of its revenues or so of Sony's pie, and about 4% of its workforce, but it doesn't sound like any of this is going to happen anyway.
Sony's balance sheet is starting to look good, but it seems 1 or 2 units are always bring down the rest, PS is doing well, but might have topped out this cycle, its somewhat likely you will see a weakening of its financials as they spend for PS5 and the end of PS4, at least normally this is what happens. (this is just my take)
I hope that helps.