This would have been awesome if it happened. Especially if Peter Sauber was at the helm. An all-German driver lineup of Schumi & HHF would have been a mouth watering prospect.
Seems that 90's F1 could have taken a completely different course had all of the bigtime manufacturers entered the sport as they had planned. We could have had a grid that featured Ferrari, Merc, Peugeot & Honda factory teams as early as 1993!
Plus, Jaguar, Renault, BMW & Toyota were all just around the corner.
Could have been just like 90's BTCC.